Pulp-engine.



UNITED STATES PATENTV OFFICE;

SAMUEL S. STEVENS, OF HOOSICK, NEW YORK.

PU LPFENGINE;

SPECIFICATION forming part of Letters Patent No. 634,038, dated October 3, 1899. Application filed February& 1898. Serial No. 66 9,629. (No model) Be it known that I, SAMUEL S. STnvENs, a citizen of the United States, residing at North Hoosick, county of Rensselaer, and State of Now York, have invented certain new and useful Improvements in Pulp Engines, of which the following is a specification.

The invention relates to such improvements; and it consists of the novel constructon and comhination of parts hereinafter described and subsequently claimed.

Reference may he had to the accom pan yin g drawings, and the letters of reference marked thereon, which form apart of this specification.

Similar letters referto similar parts in the several figures.

Fgure 1 of the drawings is a top plan View of my improved pulp-engine. Fig. 2 is a side elevation of the same with portions of the side wall and main plate broken away. Fig. 3 is a vertical cross-section taken on the broken line `3 3 in Fig. 1.

A is the vat, provided with the usual wellknown rounded ends A' and A plate A beater-roll A bed-plate A and back fall A The plate divides the interier of the vat into two side chan nels, the return-channel A and the roll-channel A in the usual manner. I

The object of my invention is to divide the current produced by a single roll and deliver the divisve or resulting currents separately into stratifying-channels interposed between the roll and the return channel, whereby the divisive currents are superposed one upon the other and returned to the roll in horizontallydisposed layer-s or strata superposed one upon the other.

My invention consists of a divisive plate extending from near the roll backward where bythe current from a single roll is divided into two parallel'currents, which are delivered, respectively, to the separate Channels of the stratifying apparatus.

B is the dvisive plate, the forward end of which presents a sharp Vertical edge in close proximity to the roll. The backend is provided with an upright B having a screwthreaded aperture adapted to receive the supporting and adjusting screw 13 rotary in the bearings B and held from sliding lengthwise insuch bearings by the shoulders 13 and B on the screw-stern.

The divisive plate is preferably made of bronze metal, with its forward end resting in a slot in the hack fall.

A platform A is erected in thevat-chan nel just back of the back fall, which extends from the back fall and the divisive plate around the curved end A of the vat to the return-channel A formin g an overlying channel B extending from the roll around the curved end A to the discharge-opening at A On the opposite side of the divisive plate is formed a Conduit-channel 13 extendiug froni the roll around the curved end A of the vat beneath the platform A to the dischargeopening A".

The discharge openings are each of the same width as the return-channel A with one subjacent to the other, so that the stock passcs along the return-channel around the curved end A' to the roll in stratified form, the divisiVe Currents forming therespective strata. e That part of the apparatus which receives the divisive Currents and disposes them in layer-s or strata was not conceived by me and I do not broadly claim the same.

I prefer to raise the bottom of the vat at the back end and provide the incline C, so that the flow of the stratified stock will be facilitated down the incline from one end of the Vat to the other.

V The use of my improved apparatus positively controls the stock,so that one-half the stock, which is engaged by one end of the beater-roll during a given passage of the stock between the roll and hed-plate, is sure to be engaged by the other end of the roll during the next passage of the stock between the roll and bed-plate. This is essential to the rapid production of nniform stock, for the reason that it is dificult or impossible to so adjust the knives of the roll and bed-plate that each end of the roll will do exactly the same quality of work.

By transferring the stock from one end of the roll to the otherin a regular and positive Inanner, as above described, I an" able to secure practical nnifornity of stock.

'IOO

The proxiniby of the divisivo plLc 1.0 the 'oll can be adjust ed as desred by 'means of the hand-wheel H on the screw-stem B.

What I claim as new, and desire to secure 5 by Letters Patent, is-

In a pulp heating and nixing engine, the conbination with a heating-roll; of a divisve plate dividing the back part; of the roll-channel and movable toward and from the 1'011;

o meansfor adjustably moving the divsive plate; and st-atifying-channels leading from the divsive plate to the return-channel, substantially as described.

In testimony whereof I have hereunto set my hand this 15th day of January, 189 8.

S. S. STEVENS.

tnesses:

GEO. A. MOSHER, FRANK C. CURTIS. 

